The 38DL PLUS is an ultrasonic thickness qauge which can be used with dual and single element transducers. The unit can be used for measurements from 0.003 to 25.000" (0.08 to 635mm) with a selectable resolution of 3 levels. Through paint Echo-to-Echo, through coat EMAT compatibility. Includes a MIN/MAX mode, two alarm modes, differential mode, B-scan (optional), application auto-recall, temperature compensation, and average/min mode. IP67, it is shock and vibration MIL certified, explosive atmosphere safe (see attached for more details), and it is thoroughly designed for tough conditions.etc...